3com 4500 50-PORT User Manual

C

HAPTER

 12: U

SING

 S

YSTEM

 M

ANAGEMENT

 C

OMMANDS

■

Execute either 

, 

, 

, 

, 

, and 

 

commands to enable the NTP feature and open UDP port 123 at the same 
time.

■

Use the 

 form of one of the above six commands to disable all 

implementation modes of the NTP feature and close UDP port 123 at the same 
time.

Any view

: Displays detailed NTP session information.

Use the 

command to display the information 

about all the sessions maintained by local NTP services. If you do not specify the 

 keyword, the brief information about all the sessions is displayed.

A Switch 4500 attempts to establish a connection in all NTP implementation 
modes except the NTP server mode.

View the status of all sessions maintained by NTP services.

<SW4500> display ntp-service sessions

     source  reference   stra reach  pollnowoffsetdelay disper

********************************************************************

[12345]1.1.1.1  127.127.1.03 377   512  178  0.040.1  22.8

note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured

Table 46   Description on the fields of the display ntp-service sessions command

source

IP address of the synchronization source

reference

Reference clock ID of the synchronization source

stra

Stratum of the clock of the synchronization source

reach

Indicates whether or not the synchronization source is reachable.

poll

Polling interval in seconds, that is, the maximum interval between two 
successive messages

now

Time elapsing since the last NTP packet is sent

offset

Clock offset

delay

Network delay